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1、More practice,Revision,Task one-Book-B:Unit5-Vocabulary.,Task two-Lets have a dictation of the words and expressions.,Task three-Book-B:Unit5-Reading A.,Task 2:Dictation,1.The singer sings beautifully because she has a beautiful v_.2.Books are our friends.They are v_.3.We can make the s_ seawater f_
2、 so that it can be drinkable.4.The water in cities go t_ the pipes under the streets.,oice,aluable,resh,hough,alt,根据句意和所给的首字母填空。,水的重要性,对于人来说，水是仅次于氧气的重要物质。在成人体内，60%的重量是水。儿童体内水的比重更大，可达近80%。如果一个人不吃饭，依靠自己体内贮存的营养物质或消耗自体组织，可以活上十天。但是如果不喝水，连几天时间也很难度过。体内失水10%就威胁健康，如失水20%,就有生命危险，足可见水对生命的重要意义。水不仅是构成身体的主要成分，而且还
3、有许多生理功能。水的溶解力很强，许多物质都能溶于水，并解离为离子状态，发挥重要的作用。,Before reading,Do you know the International World Water Day?People,as well as plants and animals,cannot live without water.So we should save water and value life.The more we know,the better we can do.,World Water Day,International World Water Day is held
4、annually on 22 March as a means of focusing attention on the importance of freshwater and advocating for the sustainable management of freshwater resources.An international day to celebrate freshwater was recommended at the 1992 United Nations Conference on Environment and Development(UNCED).The Uni
5、ted Nations General Assembly responded by designating 22 March 1993 as the first World Water Day(WWD).Each year,World Water Day highlights a specific aspect of freshwater.You can take a brief overview of the different themes that have been the focus of World Water Day celebrations by visiting the we
6、bsite:,More about World Water Day,The more we know,the better we can do.Here are some other materials about water you may be interested in.International Decade for Action Water for Life 2005-2015（2005年至2015年“生命之水”国际行动十年）,More practice,Some facts about water:Water makes up 70%of the(1)_ body.Most of
7、the water in the world is not(2)_.It is not easy to find(3)_ that is clean and safe to drink.How can we save water?Fix a dripping(4)_.Take a(5)_ instead of a(6)_.,human,drinkable,groundwater,tap,shower,bath,What else can we do to save water?,Lets save water,What else can we do?,How can we save water
8、?Its a problem for the whole world,but Beijing No 109 Middle Schools“green team”has come up with one way.The team is working on ways to save energy and resources(资源).They found that in most Beijing communities(社区),mostly drains(排水)straight to the ground.What a waste!The team put three big plastic ba
9、rrels(桶)in places around the community to collect the water.The water-saving experiment proved a success.People used it to water flowers and wash cars.Everyone thinks its a good idea.,Act right now and save water at times,Earth is our motherland in space.And on the Earth,no water,no lives.However,wi
10、th the development of human beings,Earth is in great danger now.Water,the source of life,is in really bad condition,too.Floods,water pollution,lack of drinking water are becoming more and more common and worldwide.What can we do?What should we do?Act right now and save water at times.None of us hope
11、 to see that the last drop of water will be our tears.,Language points,Therefore most of the water in the world is not drinkable.因此，世界上大部分的水是不能喝的。解析：therefore 意为“因此；所以”，与so 同义，注意其区别：therefore 是副词，不能直接用来连接两个简单 句，常放在句首，后面可以加逗号；放在句中作为插入语时，其前后都要加逗号。so 是连词，可以连接两个简单句，后面不加逗号，常用于口语中。请比较：她很友善，因此我们都喜欢她。She is
12、 kind.Therefore,we all like her.=She is kind,therefore,we all like her.=She is kind,so we all like her.,请用therefore或so填空。1.Alice studies hard.she does well in her studies.2.He drank too much tea last night,he couldnt sleep well.3.He is ill,he cant go with us.,1.Therefore,2.therefore,3.so,Language po
13、ints,Having a bath uses about twice as much water as taking a shower.泡澡所用的水大约是冲澡的两倍。twice 在本句中意为“两倍”，另外，它也有“两次”之意。英语中，“倍数”和“次数”的表达是一样的。once“一次；一倍”，twice“两次；两倍”，“三次”或“三倍”以上则用times来表达，如：four times“四次；四倍”。,Language points,倍数用在比较等级的句型时要放在该句型的前面，即：倍数+as.as.“是的倍”；倍数+比较级(bigger.)+than.“比(大)倍”。如：他们的教室是我们的两倍
14、大。Their classroom is twice as big as ours.这栋大楼比那栋高两倍。This building is twice higher than that one.,Homework assignment,As we know,water is very important to us.Saving water is saving ourselves.Besides the government,everyone can do something to protect water resources and save water.Watch the video Water in Cities and decide the topic(s)on water you are interested in and search for as much information as you can on the Internet,in books,on newspapers and so on.,Culture corner:VeniceWhat else do you know about Venice?,
